Tamping-machine for concrete blocks.



j. 0., O. C. W, GHNSON.

MMPING MACHINE FOR CONCRETE BLOCKS.

APPLICATIQN man Junin. 1911.

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JOHN o. JOHNSON, `OTTOH `JOHNSON, vAND CHARLES' W. JOHNSON, OF NEW HAMPTON,

. IOWA. i

TiiMriNer-iitaciwiIN.n ron CONCRETE VBLOCKS. c

` Specification of Le-ciers Patent. Patented Aug. 727,191.8.

Application ledJuiie 28, i917. Serial No. 177,509.

To all whom t may concern.'

Be it .known that we, JOHN O. doHixisoN,`

OTTO H. JOHNSON, andCifL-innnsll. JOHN- soN, citizens of the United States, residing at New Hampton, inthe county of Chickasaw and State of Iowa, have inventedcertain new and usefful Improvements in Tamping-Machines forvConcrete Blocks, of which the following isa specification.

This invention relates to new and useful improvements in tampingmachine forconcrete blocks.-

`The primary object ofthe inventionis the provision of af'tamping machine that may be rreadily moved about as desired and advantageously in tamping `concrete within the molds during the manufacture of building blocks orsimilar articles. n

A further object of the device is to provide a tamping machine capable of rapid operation in tamping 1 plastic compositions into desirable molds, the-device possessing great strength and being adjustable whereby the surface vbeing tamped or -acted uponby the device, may be changed at the AWillvof the operator. j I j With these general Objects in view and Vothers that will appear asthe nature .of the invention is better understood, the same consists in the novel combination and arrangement of parts `hereinafter fully described,

.. illustrated in the accompanying drawings 1 and pointed out in the appended claims. .Y

In the ydrawing forming a part 0f this application. and in which like reference characters designate corresponding parts throughout the severalviews,

Figure 1 is a front elevation of the-device partially vbroken away.

F ig. 2 is a central, vertical, sectionalv View f thereof, lportions being shown by dotted lines in their .adjusted positions.

vFig. 3 `is a transverse sectionalviewA enlarged taken upon line III-III of Fig.` 4, and f Y e Fig. 4 is a sectional View' taken upon line iv-iv of rig. a,

Referring more iny detail to the vdrawing a rectangulary frame 10, is provided having similar opposite top and bottom .ends 11, and 12 respectively, each of ,said ends being preferably formed of a pairof angle `irons 13, spaced lapart and connected to the opposite longitudinal upright sides 14, of the frame by corner brackets ll through the `angle irons `13,.

f A plurality of tainping bars larranged l ,18ftting within side grooves 20 of thesaid blocks, the said bolts'19 being laterally lslid- .able within 'longitudinalslots 21 arranged By be evident this arrangement it will .thatthe tamping bars 16 may be shifted transversely of the frame 10 and positioned closer together or farther apart as may be found desirable, the, shifting operationfbeing readily accomplished by adjusting rthe lock nuts 22 lupon the bolts 19. Tamping Yfeet or pounders 23,y are provided upon the lower ends of the bars 16 for 'engaging the plasticmate'rial being operatedy upon nduring the lowering vofthe bars 16, during thelongitudinal movement thereof. Y y.

A powershaft 24 is jouriialed transversely of the frame 10, provided with anoperating pulley 25, upon one end thereof, while a separa-te sprocket wheel 2 6 is adj ustably mountedyupon the shaft y24, for each of the bars 16,*jby means ofliubs 27, having suitable* adjustment retaining means such as the screws 28. vAdriven shaft 29 is journaled f upon the frame 10, beneath the shaft 24,k i which is also provided with a sprocket wheel 26 for each of the tamping bars 16, tliesaid wheels 26being retained in adjusted posiv tions upon the shaft 29 by any suitable means suoli as the screws 28.

Sprocket chains 30 are arranged over the sprocket'wheels 26 and 2.6 directly in- .the rear of each of the bars 16, certain of the links of eachV Chain 30 being provided with a fork' 31,'adapted for moving upwardly be- -iieath and engaging a lift collar32, with which each of the tainping bars 16 is provided. 'It will be obvious that upon turning the shaft-,24, for, moving the chains 15, so that the forks 31 will move upwardly in standing` relationrwith the' bars 16, the said forks will engage beneath the lift collar 32,

thereby elevating the bars 16, until the forks "permit the collars towpass thereover in a tripping` movement as the links of the chain 30 which carry thev forks 31 pass rearwardly `over the upper sprocket wheel-26; It will be obvious that the forks slinay be positioned at different points upon the several chains and that the collar 32 will thereby be engaged by the forks at different times,"

positioned between the chain sides as illustrated ink section in Fig. 2 of the drawing.

A ready means 1s -fprovided for maintaining either one or all of the bars 16 inoperative, when desired, thesame consisting of leaf sp'rings'35', adjustably secured upon a transverse bar 36, at the forward side of the frame-10, the said springs being of suffi-v cient length to engage beneath the forwardly projecting heel 37, of each Vadjacently positioned lift collar 32 when the bars 16 carryvingsuch collar are substantially kat the limit of their upward travel. The springs 35 being adjustable longitudinally of the bar 36, are maintained in position by screws 38.' VA

releasing means for the springs 35 consists of a plurality of cams 39, carried by a rod'lO transversely journaled through the frame 10 and having a suitable turning means such as the lever 41. f

When the lever 41 is moved to its horizontal position, the camsl 39 engage the springs 35 retaining the same forwardly of the paths of movement of the collars `32 as illustrated in Fig; 2 of the drawing. 'Vhen the Alever 41 is elevated, the cams 39 are released from the springs -35 permitting the latter to move rearwardly in substantial contact with the bars 16 and engaging beneath theicollar 32 upon theupward movement of the bars,thereby retaining the latter inoperatively elevated, as shown by dotted l ilines in Fig. 2. It will beunderstood that 4.5`

different sets of cams 39 may beso arranged upon the rod 40, as to render it possible to maintain only a part of the rods 16 elevated while the remaining rods are permitted to operate,this being readily accomplished by vhaving four cams 39 arranged inahnement upon the rod for simultaneously releasing all of the springs 35, while other cams,

, such as-'two yinnnmber may be positioned upon the rod 40 extending at a different angle forengaging only two of the springs 35, for instance the outer two springs and whereby the outer two bars 16 may be permitted to operate while the inner two bars will be inoperatively arranged by means of their respective springs 35, being in'engagement with the lift collars 32 thereof.

The complete' operation of the device will f be apparent from this detailed'description thereof, it being seen that the-tamping feet 23,may be shifted relatively of each other for' tamping the desired area while the bars 16 may be simultaneouslyor separately clevated and permitted to freely descend and at which times the weight of the bars 16 and the feet 23 are relied upon for imparting the necessary force to the operating strokes of the tampers.

` A serviceable device is arranged possessing great strength and which may be operated either by hand or by power for rapidly tamping plastic materials within suitable molds and while the form of the invention herein set forth is believed to be preferable, it is understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.

Vhat we claim as new is:

`A tamping machine comprising a frame, having upper and lower ends formed said slots shiftable transversely of the frame, pairs of guide blocks arranged between each g pair of said bolts, tamping bars longitudinally slidably arranged vertically through the said pairs of blocks at the top and bottom of the frame, tamping feet upon the lower ends of said bars, a power and a driven shaft transversely journaled upon said frame, sprocket wheels upon said shafts, sprocket chains upon said wheels arfranged directly rearwardly of the said bars, 'lift collars upon said bars, elevating forks carried by said chains adapted for upward Y movement beneath the said collars whereby the tamping bars are elevated and released during 'the turning of the said shafts when the device is in operation, retaining springs for the said bars adapted for engagement beneath the said collarsI and cam releasing means for the said springs.

2. A vtamping machine comprising a rectangular frame including spaced slides, top vand bottom members secured to the upper and lower ends of the sides and formed ofy spaced angle irons, pairs of spaced guideblocks slidably mounted between said irons, means for adjustably securing said blocks to said'irons, a plurality of tamping bars slidvablyr and adjustably mounted in said frames `and each bar extending through a pair of guide-blocks in the top and bottom irons, means for raising said tamping bars,'a shaft mounted on the sides forwardly of said tamping bars, cams adjustably mounted on said shaft, means supported by said sides beneath said cam-shaft for engagement with said cams, and means for actuating said cam-shaft for engagement with saidl cams, and cams whereby the first-named means may be moved into tamping-bar engaging position to hold the latter against operation.

3. A tamping machine comprising a rectangular frame including spaced sides, top and bottom members secured to the upper and lower ends of the sides and formed of` spaced angle irons, pairs of spaced guideblocks slidably mounted between said irons, means for adjustably securing said blocks to said irons, a plurality of taniping bars slidably and adjustably mounted in said frames and each bar extending through a pair of guide-blocks in the top and bottom irons, means for raising said tamping bars, a shaft journaled to the forward sides of said sides of the frame, spaced cams adjustably secured to said shaft, a second shaft journaled to the outer surfaces of said sides beneath said first-named shaft, spaced vertically-extending springs adjustably secured to said second shaft and normally engaging said cams, and means for actuating said first shaft and cams for moving said springs into tamping-bar position to hold the latter against movement.

In testimony whereof we affix our signatures.

JOHN O. JOHNSON. OTTO H. JOHNSON. CHARLES W. JOHNSON.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. c. 

